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AD1884AJCPZ Arkusz danych(PDF) 11 Page - Analog Devices

Numer części AD1884AJCPZ
Szczegółowy opis  High Definition Audio SoundMAX Codec
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AD1884A
Rev. 0
|
Page 11 of 20
|
March 2008
POWER AND GROUND
DVCORE 1.7 V to 1.9 V or
FILTER
1
I/O
CAUTION: DO NOT APPLY 3.3 V TO THIS PIN! Filter connection for internal core
voltage regulator.
If Pin 9 is connected to 3.3 V DVDD, this pin must be connected to filter caps: 10 μF,
1.0
μF, and 0.1μF connected in parallel between Pin 1 and DV
SS (Pin 7). Direct, filtered
1.7 V to 1.9 V DVDD can be applied to Pin 1 to lower the digital power requirements.
Pin 9 MUST be connected to Pin 1 in this case.
DVIO 1.5 V or 3.3 V
3
I
Link Digital I/O Voltage Reference. 3.3 V
± 10% or 1.5 V ± 5.5%
DVSS
7
I
Digital Supply Return (Ground).
DVDD 1.7 V to 1.9 V or 3.3 V 9
I
Digital Supply Voltage 3.3 V
± 10%. This is regulated down to DV
CORE on Pin 1 to
supply the internal digital core internal to the AD1884A. Direct, filtered 1.7 V to 1.9 V
DVDD can be applied to Pin 1 to lower the digital power requirements. Pin 9 MUST be
connected to Pin 1 in this case.
AVDD 3.3 V
25, 38
I
CAUTION: DO NOT APPLY 5 V TO THESE PINS! Analog Supply Voltage 3.3 V
± 5%.
Note: AVDD supplies should be well regulated and filtered as supply noise degrades
audio performance.
AVSS
26, 42
I
Analog Supply Return (Ground). AVSS should be connected to DVSS using a
conductive trace under, or close to, the AD1884A.
Table 4. Pin Function Descriptions (Continued)
Mnemonic
Pin No.
I/O
Description
The symbols used in this table are defined as: I = input, O = output, LI = line level input, LO = line level output, HP = output capable of driving
headphone load, MIC = input supports microphones with MIC bias and boost amplifier.


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